[em2vn]

I retired as a lineman from SWBT. We spent much of our time working in manholes in which the fear of nitrogen was ever present. One breath of that gas causes immediate permanent unconsciousness. A second breath was guaranteed death. Our safety protocols were stringent, yet some people did die from nitrogen gas during my career.

[Olog-hai]

You weren’t issued oxygen tanks and masks?

[Theophilus]

Are you sure you don't mean methane? Nitrogen does not damage at all, as the article states: we breathe it all our lives. It's only the lack of oxygen that gives the dirt nap.